Improvement in exercising-machines



JOHN PREISS. Exercising-Machine.

No. 199,932. Patented Fb. 5,1878.

` Il will!! x $1 Witnesses: I y -Inventor:

- MM/ if UNITED STATEs PATENT OEEIcE.v

JOHN PREISS, OF BUFFALO, NEW YORK.

IMPROVEMENT IN EXERCISING-MACHINES.

Specification forming part of Letters Patent No. 199,932, dated February5, 1878; application filed May 5, 1877.

Improvements on aTest-Gage; and I do hereby declare that the followingdescription of my said invention, taken in connection with theaccompanying sheet of drawings, forms afull,

' clear, and exact specication, which will enable others skilled in theart to which it appertains to make and use the same.

My invention has special reference to testgages;Y and it consists in thepeculiar and novel arrangement of parts and details of construction, ashereinafter rst fully described, and then pointed out in the claims.

In the drawings heretofore mentioned, which form a part of thisspecication, and serve to illustrate my invention more fully, Figure lisa face view of my improved testgage, with the cover and dial-plateremoved to expose its interior arrangement, shown partly in section.Fig. 2 is a sectional view of the guide-post for the handle-rods.

Like letters of reference indicate corresponding parts in both figures.

Ais a metallic cylindrical case, provided with a flan ge, a, by means ofwhich and screws c it is secured to a wall-board, B. This case issupplied with the usual cover, a glass plate, and a dial-plate graduatedinto the customary divisions of pounds, &c., a hand fastened to thepinion-stad D being employed to indicate the amount of pull or forceexerted to deilect the leaf-springs H. This case is tted in its interiorwith a small frame, O, carrying the bearings for the staff D, providedwith the pinion E, wherewith engages a toothed bar or rack, F, securedwith. its lower extremity to the member G of a series of links, G G G,pivoted to one another at g, and .to the series of Yleaf-springs H atg', said springs being secured centrally to the case A by means of thebolt h. The links G G serve to connect the two extremities of thelongest leaf of the springs H`with the link G, and this answers as meansfor transmitting motion imparted to it by the rods I and handles L tothe pinion E, in conjunction with the before-mentioned rack F. Thehandles L are pivoted to the bars I at c, and these rods are secured tothe link G by means of nuts i above and below said link. Attached to thelower side of the link G is a boss, P, serving as a guide for the upperextremity of a weak spiral spring, S, interposed between the link G andcase A, to return the said link to its normal position should, fromanylunforeseen reason, the tensioned leaf H fail to restore it tothatposition. This spiral spring S surrounds a post, It, fastened to thecase A with its lower extremity, which post is-provided with anadjusting-screw, p, serving, in connection with the boss I), as a stopto limit the downward movement of the link G beyond a certain point,corresponding to that of the eXtreme indication on the dialplate. The

rods I pass through guide-posts K, provided centrally with a passageitted with a screwplug, 7c, retaining a spiral spring, J, within saidpassage.

[u operation the handles, when pulled down, actuate the link G, andthis, in response, sets thehand on the pinion-sta D through the rack Fand pinion E while deilecting, and therefore under the inuence of theleaf-springs H.

There are in my test-gage no spiral springs to resist the action of thehand1es,which springs, owing to the very limited space within a circularcase, are at best but very irregular, and will not allow of therecording of the true and exact force or pull applied.

In my gage is, furthermore, a positive connection between the plateholding the handles and the recording device through the rack F, placedcentrally between the bars I. This arrangement obviates a drawback insimilar devices where the connection is on one side, and thereby underthe inuence of an uneven pulling on both rods, resulting in moving theindicator-hand in advance of the point indieating the true force whenthe rod nearest to said connection is more depressed than the oppositeone.

Having thus fully described my invention, what I claim, and desire tosecure to me by Letters Patent of the United States, is-

1. In a test-gage, the combination, with the case A, of the series ofcurved leaf-springs H, connecting-links G G", and a recording deviceconnected with said leaf-springs, substantially as and for the use andpurpose stated.

2. A test-gage consisting of a case, A, a series of curved springs, H,links G G' G, han# dlesIiL, rods I Land the recording. device Composed'of the rack F and pinion E, the Whole constructed and arranged tooperate substantially in the manner as and for the use and purposestated.

3. The combination, With the central link G, of the post R and theadjusting-screw p, for the purpose mentioned.

4, The combination, With the post K, of the screw-plug 7c and the spiralspring J, arranged in relation to the rod I, substantially as and forthe purpose described.

In testimony that I claim the foregoing as my invention I have heretoset :my hand and affixed my seal in the presence of two subscribingWitnesses.

JOHN Pnniss. [n s] Attest:

MICHAEL J. STARK, AFRANK HIRsoH.

